/*

 * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef OS_CPU_LINUX_X86_OS_LINUX_X86_INLINE_HPP

#define OS_CPU_LINUX_X86_OS_LINUX_X86_INLINE_HPP

#include "runtime/os.hpp"

// See http://www.technovelty.org/code/c/reading-rdtsc.htl for details

inline jlong os::rdtsc() {

#ifndef AMD64

  // 64 bit result in edx:eax

  uint64_t res;

  __asm__ __volatile__ ("rdtsc" : "=A" (res));

  return (jlong)res;

#else

  uint64_t res;

  uint32_t ts1, ts2;

  __asm__ __volatile__ ("rdtsc" : "=a" (ts1), "=d" (ts2));

  res = ((uint64_t)ts1 | (uint64_t)ts2 << 32);

  return (jlong)res;

#endif // AMD64

}

#endif // OS_CPU_LINUX_X86_OS_LINUX_X86_INLINE_HPP